Regulation on Adhaar Masking dated 24 April 2020: Clarification on Know Your Client (KYC) Process andUse of Technology for KYC: Ref: SEBI/HO/MIRSD/DOP/CIR/P/202
Regulation on Aadhaar Masking: Master Direction – Know Your Customer (KYC) Direction, 2016 (Updated 29 May 2019): RBI Aadhaar masking mandatory guidelines
This link gives you a detailed explanation by RBI to redact the aadhaar number before storing into system.
Regulation on Aadhaar Masking dated 29 January 2019: Allowing of Aadhaar Card as one of the acceptable documents for KYC- under certain conditions: Ref: IRDAI/SDD/Cl R/MISC/020/01/2019
Regulation on Aadhaar Masking dated 23 October 2018: Ordinance Aadhaar Amendment: F.No.13012/171/2018/Legal/UIDAI/114